/* Copyright 2017 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import {
  buildGetDocumentParams,
  DefaultFileReaderFactory,
  TEST_PDFS_PATH,
} from "./test_utils.js";
import {
  createPromiseCapability,
  FontType,
  ImageKind,
  InvalidPDFException,
  MissingPDFException,
  OPS,
  PasswordException,
  PasswordResponses,
  PermissionFlag,
  StreamType,
} from "../../src/shared/util.js";
import {
  DefaultCanvasFactory,
  getDocument,
  PDFDataRangeTransport,
  PDFDocumentProxy,
  PDFPageProxy,
  PDFWorker,
} from "../../src/display/api.js";
import {
  RenderingCancelledException,
  StatTimer,
} from "../../src/display/display_utils.js";
import { AutoPrintRegExp } from "../../web/ui_utils.js";
import { GlobalImageCache } from "../../src/core/image_utils.js";
import { GlobalWorkerOptions } from "../../src/display/worker_options.js";
import { isNodeJS } from "../../src/shared/is_node.js";
import { Metadata } from "../../src/display/metadata.js";

describe("api", function () {
  const basicApiFileName = "basicapi.pdf";
  const basicApiFileLength = 105779; // bytes
  const basicApiGetDocumentParams = buildGetDocumentParams(basicApiFileName);

  let CanvasFactory;

  beforeAll(function () {
    CanvasFactory = new DefaultCanvasFactory();
  });

  afterAll(function () {
    CanvasFactory = null;
  });

  function waitSome(callback) {
    const WAIT_TIMEOUT = 10;
    setTimeout(function () {
      callback();
    }, WAIT_TIMEOUT);
  }

  describe("getDocument", function () {
    it("creates pdf doc from URL-string", async function () {
      const urlStr = TEST_PDFS_PATH + basicApiFileName;
      const loadingTask = getDocument(urlStr);
      const pdfDocument = await loadingTask.promise;

      expect(typeof urlStr).toEqual("string");
      expect(pdfDocument instanceof PDFDocumentProxy).toEqual(true);
      expect(pdfDocument.numPages).toEqual(3);

      await loadingTask.destroy();
    });

    it("creates pdf doc from URL-object", async function () {
      if (isNodeJS) {
        pending("window.location is not supported in Node.js.");
      }
      const urlObj = new URL(
        TEST_PDFS_PATH + basicApiFileName,
        window.location
      );
      const loadingTask = getDocument(urlObj);
      const pdfDocument = await loadingTask.promise;

      expect(urlObj instanceof URL).toEqual(true);
      expect(pdfDocument instanceof PDFDocumentProxy).toEqual(true);
      expect(pdfDocument.numPages).toEqual(3);

      await loadingTask.destroy();
    });

    it("creates pdf doc from URL", async function () {
      const loadingTask = getDocument(basicApiGetDocumentParams);

      const progressReportedCapability = createPromiseCapability();
      // Attach the callback that is used to report loading progress;
      // similarly to how viewer.js works.
      loadingTask.onProgress = function (progressData) {
        if (!progressReportedCapability.settled) {
          progressReportedCapability.resolve(progressData);
        }
      };

      const data = await Promise.all([
        progressReportedCapability.promise,
        loadingTask.promise,
      ]);

      expect(data[0].loaded / data[0].total >= 0).toEqual(true);
      expect(data[1] instanceof PDFDocumentProxy).toEqual(true);
      expect(loadingTask).toEqual(data[1].loadingTask);

      await loadingTask.destroy();
    });

    it("creates pdf doc from URL and aborts before worker initialized", async function () {
      const loadingTask = getDocument(basicApiGetDocumentParams);
      const destroyed = loadingTask.destroy();

      try {
        await loadingTask.promise;

        // Shouldn't get here.
        expect(false).toEqual(true);
      } catch (reason) {
        expect(true).toEqual(true);
        await destroyed;
      }
    });

    it("creates pdf doc from URL and aborts loading after worker initialized", async function () {
      const loadingTask = getDocument(basicApiGetDocumentParams);
      // This can be somewhat random -- we cannot guarantee perfect
      // 'Terminate' message to the worker before/after setting up pdfManager.
      const destroyed = loadingTask._worker.promise.then(function () {
        return loadingTask.destroy();
      });

      await destroyed;
      expect(true).toEqual(true);
    });

    it("creates pdf doc from typed array", async function () {
      const typedArrayPdf = await DefaultFileReaderFactory.fetch({
        path: TEST_PDFS_PATH + basicApiFileName,
      });

      // Sanity check to make sure that we fetched the entire PDF file.
      expect(typedArrayPdf.length).toEqual(basicApiFileLength);

      const loadingTask = getDocument(typedArrayPdf);

      const progressReportedCapability = createPromiseCapability();
      loadingTask.onProgress = function (data) {
        progressReportedCapability.resolve(data);
      };

      const data = await Promise.all([
        loadingTask.promise,
        progressReportedCapability.promise,
      ]);
      expect(data[0] instanceof PDFDocumentProxy).toEqual(true);
      expect(data[1].loaded / data[1].total).toEqual(1);

      await loadingTask.destroy();
    });

    it("creates pdf doc from invalid PDF file", async function () {
      // A severely corrupt PDF file (even Adobe Reader fails to open it).
      const loadingTask = getDocument(buildGetDocumentParams("bug1020226.pdf"));

      try {
        await loadingTask.promise;

        // Shouldn't get here.
        expect(false).toEqual(true);
      } catch (reason) {
        expect(reason instanceof InvalidPDFException).toEqual(true);
        expect(reason.message).toEqual("Invalid PDF structure.");
      }

      await loadingTask.destroy();
    });

    it("creates pdf doc from non-existent URL", async function () {
      if (!isNodeJS) {
        // Re-enable in https://github.com/mozilla/pdf.js/issues/13061.
        pending("Fails intermittently on Linux in browsers.");
      }
      const loadingTask = getDocument(
        buildGetDocumentParams("non-existent.pdf")
      );

      try {
        await loadingTask.promise;

        // Shouldn't get here.
        expect(false).toEqual(true);
      } catch (reason) {
        expect(reason instanceof MissingPDFException).toEqual(true);
      }

      await loadingTask.destroy();
    });

    it("creates pdf doc from PDF file protected with user and owner password", async function () {
      const loadingTask = getDocument(buildGetDocumentParams("pr6531_1.pdf"));

      const passwordNeededCapability = createPromiseCapability();
      const passwordIncorrectCapability = createPromiseCapability();
      // Attach the callback that is used to request a password;
      // similarly to how viewer.js handles passwords.
      loadingTask.onPassword = function (updatePassword, reason) {
        if (
          reason === PasswordResponses.NEED_PASSWORD &&
          !passwordNeededCapability.settled
        ) {
          passwordNeededCapability.resolve();

          updatePassword("qwerty"); // Provide an incorrect password.
          return;
        }
        if (
          reason === PasswordResponses.INCORRECT_PASSWORD &&
          !passwordIncorrectCapability.settled
        ) {
          passwordIncorrectCapability.resolve();

          updatePassword("asdfasdf"); // Provide the correct password.
          return;
        }
        // Shouldn't get here.
        expect(false).toEqual(true);
      };

      const data = await Promise.all([
        passwordNeededCapability.promise,
        passwordIncorrectCapability.promise,
        loadingTask.promise,
      ]);
      expect(data[2] instanceof PDFDocumentProxy).toEqual(true);

      await loadingTask.destroy();
    });

    it("creates pdf doc from PDF file protected with only a user password", async function () {
      const filename = "pr6531_2.pdf";

      const passwordNeededLoadingTask = getDocument(
        buildGetDocumentParams(filename, {
          password: "",
        })
      );
      const result1 = passwordNeededLoadingTask.promise.then(
        function () {
          // Shouldn't get here.
          expect(false).toEqual(true);
          return Promise.reject(new Error("loadingTask should be rejected"));
        },
        function (data) {
          expect(data instanceof PasswordException).toEqual(true);
          expect(data.code).toEqual(PasswordResponses.NEED_PASSWORD);
          return passwordNeededLoadingTask.destroy();
        }
      );

      const passwordIncorrectLoadingTask = getDocument(
        buildGetDocumentParams(filename, {
          password: "qwerty",
        })
      );
      const result2 = passwordIncorrectLoadingTask.promise.then(
        function () {
          // Shouldn't get here.
          expect(false).toEqual(true);
          return Promise.reject(new Error("loadingTask should be rejected"));
        },
        function (data) {
          expect(data instanceof PasswordException).toEqual(true);
          expect(data.code).toEqual(PasswordResponses.INCORRECT_PASSWORD);
          return passwordIncorrectLoadingTask.destroy();
        }
      );

      const passwordAcceptedLoadingTask = getDocument(
        buildGetDocumentParams(filename, {
          password: "asdfasdf",
        })
      );
      const result3 = passwordAcceptedLoadingTask.promise.then(function (data) {
        expect(data instanceof PDFDocumentProxy).toEqual(true);
        return passwordAcceptedLoadingTask.destroy();
      });

      await Promise.all([result1, result2, result3]);
    });

    it(
      "creates pdf doc from password protected PDF file and aborts/throws " +
        "in the onPassword callback (issue 7806)",
      async function () {
        const filename = "issue3371.pdf";

        const passwordNeededLoadingTask = getDocument(
          buildGetDocumentParams(filename)
        );
        const passwordIncorrectLoadingTask = getDocument(
          buildGetDocumentParams(filename, {
            password: "qwerty",
          })
        );

        let passwordNeededDestroyed;
        passwordNeededLoadingTask.onPassword = function (callback, reason) {
          if (reason === PasswordResponses.NEED_PASSWORD) {
            passwordNeededDestroyed = passwordNeededLoadingTask.destroy();
            return;
          }
          // Shouldn't get here.
          expect(false).toEqual(true);
        };
        const result1 = passwordNeededLoadingTask.promise.then(
          function () {
            // Shouldn't get here.
            expect(false).toEqual(true);
            return Promise.reject(new Error("loadingTask should be rejected"));
          },
          function (reason) {
            expect(reason instanceof PasswordException).toEqual(true);
            expect(reason.code).toEqual(PasswordResponses.NEED_PASSWORD);
            return passwordNeededDestroyed;
          }
        );

        passwordIncorrectLoadingTask.onPassword = function (callback, reason) {
          if (reason === PasswordResponses.INCORRECT_PASSWORD) {
            throw new Error("Incorrect password");
          }
          // Shouldn't get here.
          expect(false).toEqual(true);
        };
        const result2 = passwordIncorrectLoadingTask.promise.then(
          function () {
            // Shouldn't get here.
            expect(false).toEqual(true);
            return Promise.reject(new Error("loadingTask should be rejected"));
          },
          function (reason) {
            expect(reason instanceof PasswordException).toEqual(true);
            expect(reason.code).toEqual(PasswordResponses.INCORRECT_PASSWORD);
            return passwordIncorrectLoadingTask.destroy();
          }
        );

        await Promise.all([result1, result2]);
      }
    );

    it("creates pdf doc from empty typed array", async function () {
      const loadingTask = getDocument(new Uint8Array(0));

      try {
        await loadingTask.promise;

        // Shouldn't get here.
        expect(false).toEqual(true);
      } catch (reason) {
        expect(reason instanceof InvalidPDFException).toEqual(true);
        expect(reason.message).toEqual(
          "The PDF file is empty, i.e. its size is zero bytes."
        );
      }

      await loadingTask.destroy();
    });
  });

  describe("PDFWorker", function () {
    it("worker created or destroyed", async function () {
      if (isNodeJS) {
        pending("Worker is not supported in Node.js.");
      }

      const worker = new PDFWorker({ name: "test1" });
      await worker.promise;
      expect(worker.name).toEqual("test1");
      expect(!!worker.port).toEqual(true);
      expect(worker.destroyed).toEqual(false);
      expect(!!worker._webWorker).toEqual(true);
      expect(worker.port === worker._webWorker).toEqual(true);

      worker.destroy();
      expect(!!worker.port).toEqual(false);
      expect(worker.destroyed).toEqual(true);
    });

    it("worker created or destroyed by getDocument", async function () {
      if (isNodeJS) {
        pending("Worker is not supported in Node.js.");
      }

      const loadingTask = getDocument(basicApiGetDocumentParams);
      let worker;
      loadingTask.promise.then(function () {
        worker = loadingTask._worker;
        expect(!!worker).toEqual(true);
      });

      const destroyPromise = loadingTask.promise.then(function () {
        return loadingTask.destroy();
      });
      await destroyPromise;

      const destroyedWorker = loadingTask._worker;
      expect(!!destroyedWorker).toEqual(false);
      expect(worker.destroyed).toEqual(true);
    });

    it("worker created and can be used in getDocument", async function () {
      if (isNodeJS) {
        pending("Worker is not supported in Node.js.");
      }

      const worker = new PDFWorker({ name: "test1" });
      const loadingTask = getDocument(
        buildGetDocumentParams(basicApiFileName, {
          worker,
        })
      );
      loadingTask.promise.then(function () {
        const docWorker = loadingTask._worker;
        expect(!!docWorker).toEqual(false);
        // checking is the same port is used in the MessageHandler
        const messageHandlerPort = loadingTask._transport.messageHandler.comObj;
        expect(messageHandlerPort === worker.port).toEqual(true);
      });

      const destroyPromise = loadingTask.promise.then(function () {
        return loadingTask.destroy();
      });
      await destroyPromise;

      expect(worker.destroyed).toEqual(false);
      worker.destroy();
    });

    it("creates more than one worker", async function () {
      if (isNodeJS) {
        pending("Worker is not supported in Node.js.");
      }

      const worker1 = new PDFWorker({ name: "test1" });
      const worker2 = new PDFWorker({ name: "test2" });
      const worker3 = new PDFWorker({ name: "test3" });
      await Promise.all([worker1.promise, worker2.promise, worker3.promise]);

      expect(
        worker1.port !== worker2.port &&
          worker1.port !== worker3.port &&
          worker2.port !== worker3.port
      ).toEqual(true);
      worker1.destroy();
      worker2.destroy();
      worker3.destroy();
    });

    it("gets current workerSrc", function () {
      if (isNodeJS) {
        pending("Worker is not supported in Node.js.");
      }

      const workerSrc = PDFWorker.getWorkerSrc();
      expect(typeof workerSrc).toEqual("string");
      expect(workerSrc).toEqual(GlobalWorkerOptions.workerSrc);
    });
  });

  describe("PDFDocument", function () {
    let pdfLoadingTask, pdfDocument;

    beforeAll(async function () {
      pdfLoadingTask = getDocument(basicApiGetDocumentParams);
      pdfDocument = await pdfLoadingTask.promise;
    });

    afterAll(async function () {
      await pdfLoadingTask.destroy();
    });

    it("gets number of pages", function () {
      expect(pdfDocument.numPages).toEqual(3);
    });

    it("gets fingerprint", function () {
      expect(pdfDocument.fingerprint).toEqual(
        "ea8b35919d6279a369e835bde778611b"
      );
    });

    it("gets page", async function () {
      const data = await pdfDocument.getPage(1);
      expect(data instanceof PDFPageProxy).toEqual(true);
      expect(data.pageNumber).toEqual(1);
    });

    it("gets non-existent page", async function () {
      let outOfRangePromise = pdfDocument.getPage(100);
      let nonIntegerPromise = pdfDocument.getPage(2.5);
      let nonNumberPromise = pdfDocument.getPage("1");

      outOfRangePromise = outOfRangePromise.then(
        function () {
          throw new Error("shall fail for out-of-range pageNumber parameter");
        },
        function (reason) {
          expect(reason instanceof Error).toEqual(true);
        }
      );
      nonIntegerPromise = nonIntegerPromise.then(
        function () {
          throw new Error("shall fail for non-integer pageNumber parameter");
        },
        function (reason) {
          expect(reason instanceof Error).toEqual(true);
        }
      );
      nonNumberPromise = nonNumberPromise.then(
        function () {
          throw new Error("shall fail for non-number pageNumber parameter");
        },
        function (reason) {
          expect(reason instanceof Error).toEqual(true);
        }
      );

      await Promise.all([
        outOfRangePromise,
        nonIntegerPromise,
        nonNumberPromise,
      ]);
    });

    it("gets page, from /Pages tree with circular reference", async function () {
      const loadingTask = getDocument(
        buildGetDocumentParams("Pages-tree-refs.pdf")
      );

      const page1 = loadingTask.promise.then(function (pdfDoc) {
        return pdfDoc.getPage(1).then(
          function (pdfPage) {
            expect(pdfPage instanceof PDFPageProxy).toEqual(true);
            expect(pdfPage.ref).toEqual({ num: 6, gen: 0 });
          },
          function (reason) {
            throw new Error("shall not fail for valid page");
          }
        );
      });

      const page2 = loadingTask.promise.then(function (pdfDoc) {
        return pdfDoc.getPage(2).then(
          function (pdfPage) {
            throw new Error("shall fail for invalid page");
          },
          function (reason) {
            expect(reason instanceof Error).toEqual(true);
            expect(reason.message).toEqual(
              "Pages tree contains circular reference."
            );
          }
        );
      });

      await Promise.all([page1, page2]);
      await loadingTask.destroy();
    });

    it("gets page index", async function () {
      const ref = { num: 17, gen: 0 }; // Reference to second page.
      const pageIndex = await pdfDocument.getPageIndex(ref);
      expect(pageIndex).toEqual(1);
    });

    it("gets invalid page index", async function () {
      const ref = { num: 3, gen: 0 }; // Reference to a font dictionary.

      try {
        await pdfDocument.getPageIndex(ref);

        // Shouldn't get here.
        expect(false).toEqual(true);
      } catch (reason) {
        expect(reason instanceof Error).toEqual(true);
      }
    });

    it("gets destinations, from /Dests dictionary", async function () {
      const destinations = await pdfDocument.getDestinations();
      expect(destinations).toEqual({
        chapter1: [{ gen: 0, num: 17 }, { name: "XYZ" }, 0, 841.89, null],
      });
    });

    it("gets a destination, from /Dests dictionary", async function () {
      const destination = await pdfDocument.getDestination("chapter1");
      expect(destination).toEqual([
        { gen: 0, num: 17 },
        { name: "XYZ" },
        0,
        841.89,
        null,
      ]);
    });

    it("gets a non-existent destination, from /Dests dictionary", async function () {
      const destination = await pdfDocument.getDestination(
        "non-existent-named-destination"
      );
      expect(destination).toEqual(null);
    });

    it("gets destinations, from /Names (NameTree) dictionary", async function () {
      const loadingTask = getDocument(buildGetDocumentParams("issue6204.pdf"));
      const pdfDoc = await loadingTask.promise;
      const destinations = await pdfDoc.getDestinations();
      expect(destinations).toEqual({
        "Page.1": [{ num: 1, gen: 0 }, { name: "XYZ" }, 0, 375, null],
        "Page.2": [{ num: 6, gen: 0 }, { name: "XYZ" }, 0, 375, null],
      });

      await loadingTask.destroy();
    });

    it("gets a destination, from /Names (NameTree) dictionary", async function () {
      const loadingTask = getDocument(buildGetDocumentParams("issue6204.pdf"));
      const pdfDoc = await loadingTask.promise;
      const destination = await pdfDoc.getDestination("Page.1");
      expect(destination).toEqual([
        { num: 1, gen: 0 },
        { name: "XYZ" },
        0,
        375,
        null,
      ]);

      await loadingTask.destroy();
    });

    it("gets a non-existent destination, from /Names (NameTree) dictionary", async function () {
      const loadingTask = getDocument(buildGetDocumentParams("issue6204.pdf"));
      const pdfDoc = await loadingTask.promise;
      const destination = await pdfDoc.getDestination(
        "non-existent-named-destination"
      );
      expect(destination).toEqual(null);

      await loadingTask.destroy();
    });

    it("gets a destination, from out-of-order /Names (NameTree) dictionary (issue 10272)", async function () {
      if (isNodeJS) {
        pending("Linked test-cases are not supported in Node.js.");
      }
      const loadingTask = getDocument(buildGetDocumentParams("issue10272.pdf"));
      const pdfDoc = await loadingTask.promise;
      const destination = await pdfDoc.getDestination("link_1");
      expect(destination).toEqual([
        { num: 17, gen: 0 },
        { name: "XYZ" },
        69,
        125,
        0,
      ]);

      await loadingTask.destroy();
    });

    it("gets non-string destination", async function () {
      let numberPromise = pdfDocument.getDestination(4.3);
      let booleanPromise = pdfDocument.getDestination(true);
      let arrayPromise = pdfDocument.getDestination([
        { num: 17, gen: 0 },
        { name: "XYZ" },
        0,
        841.89,
        null,
      ]);

      numberPromise = numberPromise.then(
        function () {
          throw new Error("shall fail for non-string destination.");
        },
        function (reason) {
          expect(reason instanceof Error).toEqual(true);
        }
      );
      booleanPromise = booleanPromise.then(
        function () {
          throw new Error("shall fail for non-string destination.");
        },
        function (reason) {
          expect(reason instanceof Error).toEqual(true);
        }
      );
      arrayPromise = arrayPromise.then(
        function () {
          throw new Error("shall fail for non-string destination.");
        },
        function (reason) {
          expect(reason instanceof Error).toEqual(true);
        }
      );

      await Promise.all([numberPromise, booleanPromise, arrayPromise]);
    });

    it("gets non-existent page labels", async function () {
      const pageLabels = await pdfDocument.getPageLabels();
      expect(pageLabels).toEqual(null);
    });

    it("gets page labels", async function () {
      // PageLabels with Roman/Arabic numerals.
      const loadingTask0 = getDocument(buildGetDocumentParams("bug793632.pdf"));
      const promise0 = loadingTask0.promise.then(function (pdfDoc) {
        return pdfDoc.getPageLabels();
      });

      // PageLabels with only a label prefix.
      const loadingTask1 = getDocument(buildGetDocumentParams("issue1453.pdf"));
      const promise1 = loadingTask1.promise.then(function (pdfDoc) {
        return pdfDoc.getPageLabels();
      });

      // PageLabels identical to standard page numbering.
      const loadingTask2 = getDocument(buildGetDocumentParams("rotation.pdf"));
      const promise2 = loadingTask2.promise.then(function (pdfDoc) {
        return pdfDoc.getPageLabels();
      });

      // PageLabels with bad "Prefix" entries.
      const loadingTask3 = getDocument(
        buildGetDocumentParams("bad-PageLabels.pdf")
      );
      const promise3 = loadingTask3.promise.then(function (pdfDoc) {
        return pdfDoc.getPageLabels();
      });

      const pageLabels = await Promise.all([
        promise0,
        promise1,
        promise2,
        promise3,
      ]);
      expect(pageLabels[0]).toEqual(["i", "ii", "iii", "1"]);
      expect(pageLabels[1]).toEqual(["Front Page1"]);
      expect(pageLabels[2]).toEqual(["1", "2"]);
      expect(pageLabels[3]).toEqual(["X3"]);

      await Promise.all([
        loadingTask0.destroy(),
        loadingTask1.destroy(),
        loadingTask2.destroy(),
        loadingTask3.destroy(),
      ]);
    });

    it("gets default page layout", async function () {
      const loadingTask = getDocument(
        buildGetDocumentParams("tracemonkey.pdf")
      );
      const pdfDoc = await loadingTask.promise;
      const pageLayout = await pdfDoc.getPageLayout();
      expect(pageLayout).toEqual("");

      await loadingTask.destroy();
    });

    it("gets non-default page layout", async function () {
      const pageLayout = await pdfDocument.getPageLayout();
      expect(pageLayout).toEqual("SinglePage");
    });

    it("gets default page mode", async function () {
      const loadingTask = getDocument(
        buildGetDocumentParams("tracemonkey.pdf")
      );
      const pdfDoc = await loadingTask.promise;
      const pageMode = await pdfDoc.getPageMode();
      expect(pageMode).toEqual("UseNone");

      await loadingTask.destroy();
    });

    it("gets non-default page mode", async function () {
      const pageMode = await pdfDocument.getPageMode();
      expect(pageMode).toEqual("UseOutlines");
    });

    it("gets default viewer preferences", async function () {
      const loadingTask = getDocument(
        buildGetDocumentParams("tracemonkey.pdf")
      );
      const pdfDoc = await loadingTask.promise;
      const prefs = await pdfDoc.getViewerPreferences();
      expect(prefs).toEqual(null);

      await loadingTask.destroy();
    });

    it("gets non-default viewer preferences", async function () {
      const prefs = await pdfDocument.getViewerPreferences();
      expect(prefs).toEqual({ Direction: "L2R" });
    });

    it("gets default open action", async function () {
      const loadingTask = getDocument(
        buildGetDocumentParams("tracemonkey.pdf")
      );
      const pdfDoc = await loadingTask.promise;
      const openAction = await pdfDoc.getOpenAction();
      expect(openAction).toEqual(null);

      await loadingTask.destroy();
    });

    it("gets non-default open action (with destination)", async function () {
      const openAction = await pdfDocument.getOpenAction();
      expect(openAction.dest).toEqual([
        { num: 15, gen: 0 },
        { name: "FitH" },
        null,
      ]);
      expect(openAction.action).toBeUndefined();
    });

    it("gets non-default open action (with Print action)", async function () {
      // PDF document with "Print" Named action in the OpenAction dictionary.
      const loadingTask1 = getDocument(
        buildGetDocumentParams("bug1001080.pdf")
      );
      // PDF document with "Print" Named action in the OpenAction dictionary,
      // but the OpenAction dictionary is missing the `Type` entry.
      const loadingTask2 = getDocument(
        buildGetDocumentParams("issue11442_reduced.pdf")
      );

      const promise1 = loadingTask1.promise
        .then(function (pdfDoc) {
          return pdfDoc.getOpenAction();
        })
        .then(function (openAction) {
          expect(openAction.dest).toBeUndefined();
          expect(openAction.action).toEqual("Print");

          return loadingTask1.destroy();
        });
      const promise2 = loadingTask2.promise
        .then(function (pdfDoc) {
          return pdfDoc.getOpenAction();
        })
        .then(function (openAction) {
          expect(openAction.dest).toBeUndefined();
          expect(openAction.action).toEqual("Print");

          return loadingTask2.destroy();
        });

      await Promise.all([promise1, promise2]);
    });

    it("gets non-existent attachments", async function () {
      const attachments = await pdfDocument.getAttachments();
      expect(attachments).toEqual(null);
    });

    it("gets attachments", async function () {
      const loadingTask = getDocument(buildGetDocumentParams("attachment.pdf"));
      const pdfDoc = await loadingTask.promise;
      const attachments = await pdfDoc.getAttachments();

      const attachment = attachments["foo.txt"];
      expect(attachment.filename).toEqual("foo.txt");
      expect(attachment.content).toEqual(
        new Uint8Array([98, 97, 114, 32, 98, 97, 122, 32, 10])
      );

      await loadingTask.destroy();
    });

    it("gets javascript", async function () {
      const javascript = await pdfDocument.getJavaScript();
      expect(javascript).toEqual(null);
    });

    it("gets javascript with printing instructions (JS action)", async function () {
      // PDF document with "JavaScript" action in the OpenAction dictionary.
      const loadingTask = getDocument(buildGetDocumentParams("issue6106.pdf"));
      const pdfDoc = await loadingTask.promise;
      const javascript = await pdfDoc.getJavaScript();

      expect(javascript).toEqual([
        "this.print({bUI:true,bSilent:false,bShrinkToFit:true});",
      ]);
      expect(javascript[0]).toMatch(AutoPrintRegExp);

      await loadingTask.destroy();
    });

    it("gets hasJSActions, in document without javaScript", async function () {
      const hasJSActions = await pdfDocument.hasJSActions();

      expect(hasJSActions).toEqual(false);
    });

    it("gets hasJSActions, in document with javaScript", async function () {
      const loadingTask = getDocument(
        buildGetDocumentParams("doc_actions.pdf")
      );
      const pdfDoc = await loadingTask.promise;
      const hasJSActions = await pdfDoc.hasJSActions();

      expect(hasJSActions).toEqual(true);

      await loadingTask.destroy();
    });

    it("gets non-existent JSActions", async function () {
      const jsActions = await pdfDocument.getJSActions();
      expect(jsActions).toEqual(null);
    });

    it("gets JSActions", async function () {
      // PDF document with "JavaScript" action in the OpenAction dictionary.
      const loadingTask = getDocument(
        buildGetDocumentParams("doc_actions.pdf")
      );
      const pdfDoc = await loadingTask.promise;
      const docActions = await pdfDoc.getJSActions();
      const page1 = await pdfDoc.getPage(1);
      const page1Actions = await page1.getJSActions();
      const page3 = await pdfDoc.getPage(3);
      const page3Actions = await page3.getJSActions();

      expect(docActions).toEqual({
        DidPrint: [`this.getField("Text2").value = "DidPrint";`],
        DidSave: [`this.getField("Text2").value = "DidSave";`],
        WillClose: [`this.getField("Text1").value = "WillClose";`],
        WillPrint: [`this.getField("Text1").value = "WillPrint";`],
        WillSave: [`this.getField("Text1").value = "WillSave";`],
      });
      expect(page1Actions).toEqual({
        PageOpen: [`this.getField("Text1").value = "PageOpen 1";`],
        PageClose: [`this.getField("Text2").value = "PageClose 1";`],
      });
      expect(page3Actions).toEqual({
        PageOpen: [`this.getField("Text5").value = "PageOpen 3";`],
        PageClose: [`this.getField("Text6").value = "PageClose 3";`],
      });

      await loadingTask.destroy();
    });

    it("gets non-existent outline", async function () {
      const loadingTask = getDocument(
        buildGetDocumentParams("tracemonkey.pdf")
      );
      const pdfDoc = await loadingTask.promise;
      const outline = await pdfDoc.getOutline();
      expect(outline).toEqual(null);

      await loadingTask.destroy();
    });

    it("gets outline", async function () {
      const outline = await pdfDocument.getOutline();

      // Two top level entries.
      expect(Array.isArray(outline)).toEqual(true);
      expect(outline.length).toEqual(2);

      // Make sure some basic attributes are set.
      const outlineItem = outline[1];
      expect(outlineItem.title).toEqual("Chapter 1");
      expect(Array.isArray(outlineItem.dest)).toEqual(true);
      expect(outlineItem.url).toEqual(null);
      expect(outlineItem.unsafeUrl).toBeUndefined();
      expect(outlineItem.newWindow).toBeUndefined();

      expect(outlineItem.bold).toEqual(true);
      expect(outlineItem.italic).toEqual(false);
      expect(outlineItem.color).toEqual(new Uint8ClampedArray([0, 64, 128]));

      expect(outlineItem.items.length).toEqual(1);
      expect(outlineItem.items[0].title).toEqual("Paragraph 1.1");
    });

    it("gets outline containing a URL", async function () {
      const loadingTask = getDocument(buildGetDocumentParams("issue3214.pdf"));
      const pdfDoc = await loadingTask.promise;
      const outline = await pdfDoc.getOutline();
      expect(Array.isArray(outline)).toEqual(true);
      expect(outline.length).toEqual(5);

      const outlineItemTwo = outline[2];
      expect(typeof outlineItemTwo.title).toEqual("string");
      expect(outlineItemTwo.dest).toEqual(null);
      expect(outlineItemTwo.url).toEqual("http://google.com/");
      expect(outlineItemTwo.unsafeUrl).toEqual("http://google.com");
      expect(outlineItemTwo.newWindow).toBeUndefined();

      const outlineItemOne = outline[1];
      expect(outlineItemOne.bold).toEqual(false);
      expect(outlineItemOne.italic).toEqual(true);
      expect(outlineItemOne.color).toEqual(new Uint8ClampedArray([0, 0, 0]));

      await loadingTask.destroy();
    });

    it("gets non-existent permissions", async function () {
      const permissions = await pdfDocument.getPermissions();
      expect(permissions).toEqual(null);
    });

    it("gets permissions", async function () {
      // Editing not allowed.
      const loadingTask0 = getDocument(
        buildGetDocumentParams("issue9972-1.pdf")
      );
      const promise0 = loadingTask0.promise.then(function (pdfDoc) {
        return pdfDoc.getPermissions();
      });

      // Printing not allowed.
      const loadingTask1 = getDocument(
        buildGetDocumentParams("issue9972-2.pdf")
      );
      const promise1 = loadingTask1.promise.then(function (pdfDoc) {
        return pdfDoc.getPermissions();
      });

      // Copying not allowed.
      const loadingTask2 = getDocument(
        buildGetDocumentParams("issue9972-3.pdf")
      );
      const promise2 = loadingTask2.promise.then(function (pdfDoc) {
        return pdfDoc.getPermissions();
      });

      const totalPermissionCount = Object.keys(PermissionFlag).length;
      const permissions = await Promise.all([promise0, promise1, promise2]);

      expect(permissions[0].length).toEqual(totalPermissionCount - 1);
      expect(
        permissions[0].includes(PermissionFlag.MODIFY_CONTENTS)
      ).toBeFalsy();

      expect(permissions[1].length).toEqual(totalPermissionCount - 2);
      expect(permissions[1].includes(PermissionFlag.PRINT)).toBeFalsy();
      expect(
        permissions[1].includes(PermissionFlag.PRINT_HIGH_QUALITY)
      ).toBeFalsy();

      expect(permissions[2].length).toEqual(totalPermissionCount - 1);
      expect(permissions[2].includes(PermissionFlag.COPY)).toBeFalsy();

      await Promise.all([
        loadingTask0.destroy(),
        loadingTask1.destroy(),
        loadingTask2.destroy(),
      ]);
    });

    it("gets metadata", async function () {
      const { info, metadata, contentDispositionFilename, contentLength } =
        await pdfDocument.getMetadata();

      expect(info.Title).toEqual("Basic API Test");
      // Custom, non-standard, information dictionary entries.
      expect(info.Custom).toEqual(undefined);
      // The following are PDF.js specific, non-standard, properties.
      expect(info.PDFFormatVersion).toEqual("1.7");
      expect(info.IsLinearized).toEqual(false);
      expect(info.IsAcroFormPresent).toEqual(false);
      expect(info.IsXFAPresent).toEqual(false);
      expect(info.IsCollectionPresent).toEqual(false);
      expect(info.IsSignaturesPresent).toEqual(false);

      expect(metadata instanceof Metadata).toEqual(true);
      expect(metadata.get("dc:title")).toEqual("Basic API Test");

      expect(contentDispositionFilename).toEqual(null);
      expect(contentLength).toEqual(basicApiFileLength);
    });

    it("gets metadata, with custom info dict entries", async function () {
      const loadingTask = getDocument(
        buildGetDocumentParams("tracemonkey.pdf")
      );
      const pdfDoc = await loadingTask.promise;
      const { info, metadata, contentDispositionFilename, contentLength } =
        await pdfDoc.getMetadata();

      expect(info.Creator).toEqual("TeX");
      expect(info.Producer).toEqual("pdfeTeX-1.21a");
      expect(info.CreationDate).toEqual("D:20090401163925-07'00'");
      // Custom, non-standard, information dictionary entries.
      const custom = info.Custom;
      expect(typeof custom === "object" && custom !== null).toEqual(true);

      expect(custom["PTEX.Fullbanner"]).toEqual(
        "This is pdfeTeX, " +
          "Version 3.141592-1.21a-2.2 (Web2C 7.5.4) kpathsea version 3.5.6"
      );
      // The following are PDF.js specific, non-standard, properties.
      expect(info.PDFFormatVersion).toEqual("1.4");
      expect(info.IsLinearized).toEqual(false);
      expect(info.IsAcroFormPresent).toEqual(false);
      expect(info.IsXFAPresent).toEqual(false);
      expect(info.IsCollectionPresent).toEqual(false);
      expect(info.IsSignaturesPresent).toEqual(false);

      expect(metadata).toEqual(null);
      expect(contentDispositionFilename).toEqual(null);
      expect(contentLength).toEqual(1016315);

      await loadingTask.destroy();
    });

    it("gets metadata, with missing PDF header (bug 1606566)", async function () {
      const loadingTask = getDocument(buildGetDocumentParams("bug1606566.pdf"));
      const pdfDoc = await loadingTask.promise;
      const { info, metadata, contentDispositionFilename, contentLength } =
        await pdfDoc.getMetadata();

      // The following are PDF.js specific, non-standard, properties.
      expect(info.PDFFormatVersion).toEqual(null);
      expect(info.IsLinearized).toEqual(false);
      expect(info.IsAcroFormPresent).toEqual(false);
      expect(info.IsXFAPresent).toEqual(false);
      expect(info.IsCollectionPresent).toEqual(false);
      expect(info.IsSignaturesPresent).toEqual(false);

      expect(metadata).toEqual(null);
      expect(contentDispositionFilename).toEqual(null);
      expect(contentLength).toEqual(624);

      await loadingTask.destroy();
    });

    it("gets markInfo", async function () {
      const loadingTask = getDocument(
        buildGetDocumentParams("annotation-line.pdf")
      );
      const pdfDoc = await loadingTask.promise;
      const markInfo = await pdfDoc.getMarkInfo();
      expect(markInfo.Marked).toEqual(true);
      expect(markInfo.UserProperties).toEqual(false);
      expect(markInfo.Suspects).toEqual(false);
    });

    it("gets data", async function () {
      const data = await pdfDocument.getData();
      expect(data instanceof Uint8Array).toEqual(true);
      expect(data.length).toEqual(basicApiFileLength);
    });

    it("gets download info", async function () {
      const downloadInfo = await pdfDocument.getDownloadInfo();
      expect(downloadInfo).toEqual({ length: basicApiFileLength });
    });

    it("gets document stats", async function () {
      const stats = await pdfDocument.getStats();
      expect(stats).toEqual({ streamTypes: {}, fontTypes: {} });
    });

    it("cleans up document resources", async function () {
      await pdfDocument.cleanup();

      expect(true).toEqual(true);
    });

    it("checks that fingerprints are unique", async function () {
      const loadingTask1 = getDocument(
        buildGetDocumentParams("issue4436r.pdf")
      );
      const loadingTask2 = getDocument(buildGetDocumentParams("issue4575.pdf"));

      const data = await Promise.all([
        loadingTask1.promise,
        loadingTask2.promise,
      ]);
      const fingerprint1 = data[0].fingerprint;
      const fingerprint2 = data[1].fingerprint;

      expect(fingerprint1).not.toEqual(fingerprint2);

      expect(fingerprint1).toEqual("2f695a83d6e7553c24fc08b7ac69712d");
      expect(fingerprint2).toEqual("04c7126b34a46b6d4d6e7a1eff7edcb6");

      await Promise.all([loadingTask1.destroy(), loadingTask2.destroy()]);
    });

    describe("Cross-origin", function () {
      let loadingTask;
      function _checkCanLoad(expectSuccess, filename, options) {
        if (isNodeJS) {
          pending("Cannot simulate cross-origin requests in Node.js");
        }
        const params = buildGetDocumentParams(filename, options);
        const url = new URL(params.url);
        if (url.hostname === "localhost") {
          url.hostname = "127.0.0.1";
        } else if (params.url.hostname === "127.0.0.1") {
          url.hostname = "localhost";
        } else {
          pending("Can only run cross-origin test on localhost!");
        }
        params.url = url.href;
        loadingTask = getDocument(params);
        return loadingTask.promise
          .then(function (pdf) {
            return pdf.destroy();
          })
          .then(
            function () {
              expect(expectSuccess).toEqual(true);
            },
            function (error) {
              if (expectSuccess) {
                // For ease of debugging.
                expect(error).toEqual("There should not be any error");
              }
              expect(expectSuccess).toEqual(false);
            }
          );
      }
      function testCanLoad(filename, options) {
        return _checkCanLoad(true, filename, options);
      }
      function testCannotLoad(filename, options) {
        return _checkCanLoad(false, filename, options);
      }

      afterEach(async function () {
        if (loadingTask && !loadingTask.destroyed) {
          await loadingTask.destroy();
        }
      });

      it("server disallows cors", async function () {
        await testCannotLoad("basicapi.pdf");
      });

      it("server allows cors without credentials, default withCredentials", async function () {
        await testCanLoad("basicapi.pdf?cors=withoutCredentials");
      });

      it("server allows cors without credentials, and withCredentials=false", async function () {
        await testCanLoad("basicapi.pdf?cors=withoutCredentials", {
          withCredentials: false,
        });
      });

      it("server allows cors without credentials, but withCredentials=true", async function () {
        await testCannotLoad("basicapi.pdf?cors=withoutCredentials", {
          withCredentials: true,
        });
      });

      it("server allows cors with credentials, and withCredentials=true", async function () {
        await testCanLoad("basicapi.pdf?cors=withCredentials", {
          withCredentials: true,
        });
      });

      it("server allows cors with credentials, and withCredentials=false", async function () {
        // The server supports even more than we need, so if the previous tests
        // pass, then this should pass for sure.
        // The only case where this test fails is when the server does not reply
        // with the Access-Control-Allow-Origin header.
        await testCanLoad("basicapi.pdf?cors=withCredentials", {
          withCredentials: false,
        });
      });
    });
  });

  describe("Page", function () {
    let pdfLoadingTask, pdfDocument, page;

    beforeAll(async function () {
      pdfLoadingTask = getDocument(basicApiGetDocumentParams);
      pdfDocument = await pdfLoadingTask.promise;
      page = await pdfDocument.getPage(1);
    });

    afterAll(async function () {
      await pdfLoadingTask.destroy();
    });

    it("gets page number", function () {
      expect(page.pageNumber).toEqual(1);
    });

    it("gets rotate", function () {
      expect(page.rotate).toEqual(0);
    });

    it("gets ref", function () {
      expect(page.ref).toEqual({ num: 15, gen: 0 });
    });

    it("gets userUnit", function () {
      expect(page.userUnit).toEqual(1.0);
    });

    it("gets view", function () {
      expect(page.view).toEqual([0, 0, 595.28, 841.89]);
    });

    it("gets view, with empty/invalid bounding boxes", async function () {
      const viewLoadingTask = getDocument(
        buildGetDocumentParams("boundingBox_invalid.pdf")
      );

      const pdfDoc = await viewLoadingTask.promise;
      const numPages = pdfDoc.numPages;
      expect(numPages).toEqual(3);

      const viewPromises = [];
      for (let i = 0; i < numPages; i++) {
        viewPromises[i] = pdfDoc.getPage(i + 1).then(pdfPage => {
          return pdfPage.view;
        });
      }

      const [page1, page2, page3] = await Promise.all(viewPromises);
      expect(page1).toEqual([0, 0, 612, 792]);
      expect(page2).toEqual([0, 0, 800, 600]);
      expect(page3).toEqual([0, 0, 600, 800]);

      await viewLoadingTask.destroy();
    });

    it("gets viewport", function () {
      const viewport = page.getViewport({ scale: 1.5, rotation: 90 });
      expect(viewport.viewBox).toEqual(page.view);
      expect(viewport.scale).toEqual(1.5);
      expect(viewport.rotation).toEqual(90);
      expect(viewport.transform).toEqual([0, 1.5, 1.5, 0, 0, 0]);
      expect(viewport.width).toEqual(1262.835);
      expect(viewport.height).toEqual(892.92);
    });

    it('gets viewport with "offsetX/offsetY" arguments', function () {
      const viewport = page.getViewport({
        scale: 1,
        rotation: 0,
        offsetX: 100,
        offsetY: -100,
      });
      expect(viewport.transform).toEqual([1, 0, 0, -1, 100, 741.89]);
    });

    it('gets viewport respecting "dontFlip" argument', function () {
      const scale = 1,
        rotation = 0;
      const viewport = page.getViewport({ scale, rotation });
      const dontFlipViewport = page.getViewport({
        scale,
        rotation,
        dontFlip: true,
      });

      expect(dontFlipViewport).not.toEqual(viewport);
      expect(dontFlipViewport).toEqual(viewport.clone({ dontFlip: true }));

      expect(viewport.transform).toEqual([1, 0, 0, -1, 0, 841.89]);
      expect(dontFlipViewport.transform).toEqual([1, 0, -0, 1, 0, 0]);
    });

    it("gets viewport with invalid rotation", function () {
      expect(function () {
        page.getViewport({ scale: 1, rotation: 45 });
      }).toThrow(
        new Error(
          "PageViewport: Invalid rotation, must be a multiple of 90 degrees."
        )
      );
    });

    it("gets annotations", async function () {
      const defaultPromise = page.getAnnotations().then(function (data) {
        expect(data.length).toEqual(4);
      });

      const displayPromise = page
        .getAnnotations({ intent: "display" })
        .then(function (data) {
          expect(data.length).toEqual(4);
        });

      const printPromise = page
        .getAnnotations({ intent: "print" })
        .then(function (data) {
          expect(data.length).toEqual(4);
        });

      await Promise.all([defaultPromise, displayPromise, printPromise]);
    });

    it("gets annotations containing relative URLs (bug 766086)", async function () {
      const filename = "bug766086.pdf";

      const defaultLoadingTask = getDocument(buildGetDocumentParams(filename));
      const defaultPromise = defaultLoadingTask.promise.then(function (pdfDoc) {
        return pdfDoc.getPage(1).then(function (pdfPage) {
          return pdfPage.getAnnotations();
        });
      });

      const docBaseUrlLoadingTask = getDocument(
        buildGetDocumentParams(filename, {
          docBaseUrl: "http://www.example.com/test/pdfs/qwerty.pdf",
        })
      );
      const docBaseUrlPromise = docBaseUrlLoadingTask.promise.then(function (
        pdfDoc
      ) {
        return pdfDoc.getPage(1).then(function (pdfPage) {
          return pdfPage.getAnnotations();
        });
      });

      const invalidDocBaseUrlLoadingTask = getDocument(
        buildGetDocumentParams(filename, {
          docBaseUrl: "qwerty.pdf",
        })
      );
      const invalidDocBaseUrlPromise =
        invalidDocBaseUrlLoadingTask.promise.then(function (pdfDoc) {
          return pdfDoc.getPage(1).then(function (pdfPage) {
            return pdfPage.getAnnotations();
          });
        });

      const [
        defaultAnnotations,
        docBaseUrlAnnotations,
        invalidDocBaseUrlAnnotations,
      ] = await Promise.all([
        defaultPromise,
        docBaseUrlPromise,
        invalidDocBaseUrlPromise,
      ]);

      expect(defaultAnnotations[0].url).toBeUndefined();
      expect(defaultAnnotations[0].unsafeUrl).toEqual(
        "../../0021/002156/215675E.pdf#15"
      );

      expect(docBaseUrlAnnotations[0].url).toEqual(
        "http://www.example.com/0021/002156/215675E.pdf#15"
      );
      expect(docBaseUrlAnnotations[0].unsafeUrl).toEqual(
        "../../0021/002156/215675E.pdf#15"
      );

      expect(invalidDocBaseUrlAnnotations[0].url).toBeUndefined();
      expect(invalidDocBaseUrlAnnotations[0].unsafeUrl).toEqual(
        "../../0021/002156/215675E.pdf#15"
      );

      await Promise.all([
        defaultLoadingTask.destroy(),
        docBaseUrlLoadingTask.destroy(),
        invalidDocBaseUrlLoadingTask.destroy(),
      ]);
    });

    it("gets text content", async function () {
      const defaultPromise = page.getTextContent();
      const parametersPromise = page.getTextContent({
        normalizeWhitespace: true,
        disableCombineTextItems: true,
      });

      const data = await Promise.all([defaultPromise, parametersPromise]);

      expect(!!data[0].items).toEqual(true);
      expect(data[0].items.length).toEqual(12);
      expect(!!data[0].styles).toEqual(true);

      expect(!!data[1].items).toEqual(true);
      expect(data[1].items.length).toEqual(7);
      expect(!!data[1].styles).toEqual(true);
    });

    it("gets text content, with correct properties (issue 8276)", async function () {
      const loadingTask = getDocument(
        buildGetDocumentParams("issue8276_reduced.pdf")
      );
      const pdfDoc = await loadingTask.promise;
      const pdfPage = await pdfDoc.getPage(1);
      const { items, styles } = await pdfPage.getTextContent();
      expect(items.length).toEqual(1);
      expect(Object.keys(styles)).toEqual(["Times"]);

      expect(items[0]).toEqual({
        dir: "ltr",
        fontName: "Times",
        height: 18,
        str: "Issue 8276",
        transform: [18, 0, 0, 18, 441.81, 708.4499999999999],
        width: 77.49,
        hasEOL: false,
      });
      expect(styles.Times).toEqual({
        fontFamily: "serif",
        ascent: NaN,
        descent: NaN,
        vertical: false,
      });

      await loadingTask.destroy();
    });

    it("gets empty structure tree", async function () {
      const tree = await page.getStructTree();

      expect(tree).toEqual(null);
    });

    it("gets simple structure tree", async function () {
      const loadingTask = getDocument(
        buildGetDocumentParams("structure_simple.pdf")
      );
      const pdfDoc = await loadingTask.promise;
      const pdfPage = await pdfDoc.getPage(1);
      const tree = await pdfPage.getStructTree();

      expect(tree).toEqual({
        role: "Root",
        children: [
          {
            role: "Document",
            children: [
              {
                role: "H1",
                children: [
                  {
                    role: "NonStruct",
                    children: [{ type: "content", id: "page2R_mcid0" }],
                  },
                ],
              },
              {
                role: "P",
                children: [
                  {
                    role: "NonStruct",
                    children: [{ type: "content", id: "page2R_mcid1" }],
                  },
                ],
              },
              {
                role: "H2",
                children: [
                  {
                    role: "NonStruct",
                    children: [{ type: "content", id: "page2R_mcid2" }],
                  },
                ],
              },
              {
                role: "P",
                children: [
                  {
                    role: "NonStruct",
                    children: [{ type: "content", id: "page2R_mcid3" }],
                  },
                ],
              },
            ],
          },
        ],
      });

      await loadingTask.destroy();
    });

    it("gets operator list", async function () {
      const operatorList = await page.getOperatorList();
      expect(!!operatorList.fnArray).toEqual(true);
      expect(!!operatorList.argsArray).toEqual(true);
      expect(operatorList.lastChunk).toEqual(true);
    });

    it("gets operatorList with JPEG image (issue 4888)", async function () {
      const loadingTask = getDocument(buildGetDocumentParams("cmykjpeg.pdf"));

      const pdfDoc = await loadingTask.promise;
      const pdfPage = await pdfDoc.getPage(1);
      const operatorList = await pdfPage.getOperatorList();

      const imgIndex = operatorList.fnArray.indexOf(OPS.paintImageXObject);
      const imgArgs = operatorList.argsArray[imgIndex];
      const { data } = pdfPage.objs.get(imgArgs[0]);

      expect(data instanceof Uint8ClampedArray).toEqual(true);
      expect(data.length).toEqual(90000);

      await loadingTask.destroy();
    });

    it(
      "gets operatorList, from corrupt PDF file (issue 8702), " +
        "with/without `stopAtErrors` set",
      async function () {
        const loadingTask1 = getDocument(
          buildGetDocumentParams("issue8702.pdf", {
            stopAtErrors: false, // The default value.
          })
        );
        const loadingTask2 = getDocument(
          buildGetDocumentParams("issue8702.pdf", {
            stopAtErrors: true,
          })
        );

        const result1 = loadingTask1.promise.then(pdfDoc => {
          return pdfDoc.getPage(1).then(pdfPage => {
            return pdfPage.getOperatorList().then(opList => {
              expect(opList.fnArray.length).toBeGreaterThan(100);
              expect(opList.argsArray.length).toBeGreaterThan(100);
              expect(opList.lastChunk).toEqual(true);

              return loadingTask1.destroy();
            });
          });
        });

        const result2 = loadingTask2.promise.then(pdfDoc => {
          return pdfDoc.getPage(1).then(pdfPage => {
            return pdfPage.getOperatorList().then(opList => {
              expect(opList.fnArray.length).toEqual(0);
              expect(opList.argsArray.length).toEqual(0);
              expect(opList.lastChunk).toEqual(true);

              return loadingTask2.destroy();
            });
          });
        });

        await Promise.all([result1, result2]);
      }
    );

    it("gets document stats after parsing page", async function () {
      const stats = await page.getOperatorList().then(function () {
        return pdfDocument.getStats();
      });

      const expectedStreamTypes = {};
      expectedStreamTypes[StreamType.FLATE] = true;
      const expectedFontTypes = {};
      expectedFontTypes[FontType.TYPE1] = true;
      expectedFontTypes[FontType.CIDFONTTYPE2] = true;

      expect(stats).toEqual({
        streamTypes: expectedStreamTypes,
        fontTypes: expectedFontTypes,
      });
    });

    it("gets page stats after parsing page, without `pdfBug` set", async function () {
      await page.getOperatorList();
      expect(page.stats).toEqual(null);
    });

    it("gets page stats after parsing page, with `pdfBug` set", async function () {
      const loadingTask = getDocument(
        buildGetDocumentParams(basicApiFileName, { pdfBug: true })
      );
      const pdfDoc = await loadingTask.promise;
      const pdfPage = await pdfDoc.getPage(1);
      await pdfPage.getOperatorList();
      const stats = pdfPage.stats;

      expect(stats instanceof StatTimer).toEqual(true);
      expect(stats.times.length).toEqual(1);

      const [statEntry] = stats.times;
      expect(statEntry.name).toEqual("Page Request");
      expect(statEntry.end - statEntry.start).toBeGreaterThanOrEqual(0);

      await loadingTask.destroy();
    });

    it("gets page stats after rendering page, with `pdfBug` set", async function () {
      const loadingTask = getDocument(
        buildGetDocumentParams(basicApiFileName, { pdfBug: true })
      );
      const pdfDoc = await loadingTask.promise;
      const pdfPage = await pdfDoc.getPage(1);
      const viewport = pdfPage.getViewport({ scale: 1 });
      const canvasAndCtx = CanvasFactory.create(
        viewport.width,
        viewport.height
      );
      const renderTask = pdfPage.render({
        canvasContext: canvasAndCtx.context,
        canvasFactory: CanvasFactory,
        viewport,
      });
      await renderTask.promise;
      const stats = pdfPage.stats;

      expect(stats instanceof StatTimer).toEqual(true);
      expect(stats.times.length).toEqual(3);

      const [statEntryOne, statEntryTwo, statEntryThree] = stats.times;
      expect(statEntryOne.name).toEqual("Page Request");
      expect(statEntryOne.end - statEntryOne.start).toBeGreaterThanOrEqual(0);

      expect(statEntryTwo.name).toEqual("Rendering");
      expect(statEntryTwo.end - statEntryTwo.start).toBeGreaterThan(0);

      expect(statEntryThree.name).toEqual("Overall");
      expect(statEntryThree.end - statEntryThree.start).toBeGreaterThan(0);

      CanvasFactory.destroy(canvasAndCtx);
      await loadingTask.destroy();
    });

    it("cancels rendering of page", async function () {
      const viewport = page.getViewport({ scale: 1 });
      const canvasAndCtx = CanvasFactory.create(
        viewport.width,
        viewport.height
      );

      const renderTask = page.render({
        canvasContext: canvasAndCtx.context,
        canvasFactory: CanvasFactory,
        viewport,
      });
      renderTask.cancel();

      try {
        await renderTask.promise;

        // Shouldn't get here.
        expect(false).toEqual(true);
      } catch (reason) {
        expect(reason instanceof RenderingCancelledException).toEqual(true);
        expect(reason.message).toEqual("Rendering cancelled, page 1");
        expect(reason.type).toEqual("canvas");
      }

      CanvasFactory.destroy(canvasAndCtx);
    });

    it("re-render page, using the same canvas, after cancelling rendering", async function () {
      const viewport = page.getViewport({ scale: 1 });
      const canvasAndCtx = CanvasFactory.create(
        viewport.width,
        viewport.height
      );

      const renderTask = page.render({
        canvasContext: canvasAndCtx.context,
        canvasFactory: CanvasFactory,
        viewport,
      });
      renderTask.cancel();

      try {
        await renderTask.promise;

        // Shouldn't get here.
        expect(false).toEqual(true);
      } catch (reason) {
        expect(reason instanceof RenderingCancelledException).toEqual(true);
      }

      const reRenderTask = page.render({
        canvasContext: canvasAndCtx.context,
        canvasFactory: CanvasFactory,
        viewport,
      });
      await reRenderTask.promise;

      CanvasFactory.destroy(canvasAndCtx);
    });

    it("multiple render() on the same canvas", async function () {
      const optionalContentConfigPromise =
        pdfDocument.getOptionalContentConfig();

      const viewport = page.getViewport({ scale: 1 });
      const canvasAndCtx = CanvasFactory.create(
        viewport.width,
        viewport.height
      );

      const renderTask1 = page.render({
        canvasContext: canvasAndCtx.context,
        canvasFactory: CanvasFactory,
        viewport,
        optionalContentConfigPromise,
      });
      const renderTask2 = page.render({
        canvasContext: canvasAndCtx.context,
        canvasFactory: CanvasFactory,
        viewport,
        optionalContentConfigPromise,
      });

      await Promise.all([
        renderTask1.promise,
        renderTask2.promise.then(
          () => {
            // Shouldn't get here.
            expect(false).toEqual(true);
          },
          reason => {
            // It fails because we are already using this canvas.
            expect(/multiple render\(\)/.test(reason.message)).toEqual(true);
          }
        ),
      ]);
    });

    it("cleans up document resources after rendering of page", async function () {
      const loadingTask = getDocument(buildGetDocumentParams(basicApiFileName));
      const pdfDoc = await loadingTask.promise;
      const pdfPage = await pdfDoc.getPage(1);

      const viewport = pdfPage.getViewport({ scale: 1 });
      const canvasAndCtx = CanvasFactory.create(
        viewport.width,
        viewport.height
      );

      const renderTask = pdfPage.render({
        canvasContext: canvasAndCtx.context,
        canvasFactory: CanvasFactory,
        viewport,
      });
      await renderTask.promise;

      await pdfDoc.cleanup();

      expect(true).toEqual(true);

      CanvasFactory.destroy(canvasAndCtx);
      await loadingTask.destroy();
    });

    it("cleans up document resources during rendering of page", async function () {
      const loadingTask = getDocument(
        buildGetDocumentParams("tracemonkey.pdf")
      );
      const pdfDoc = await loadingTask.promise;
      const pdfPage = await pdfDoc.getPage(1);

      const viewport = pdfPage.getViewport({ scale: 1 });
      const canvasAndCtx = CanvasFactory.create(
        viewport.width,
        viewport.height
      );

      const renderTask = pdfPage.render({
        canvasContext: canvasAndCtx.context,
        canvasFactory: CanvasFactory,
        viewport,
      });
      // Ensure that clean-up runs during rendering.
      renderTask.onContinue = function (cont) {
        waitSome(cont);
      };

      try {
        await pdfDoc.cleanup();

        // Shouldn't get here.
        expect(false).toEqual(true);
      } catch (reason) {
        expect(reason instanceof Error).toEqual(true);
        expect(reason.message).toEqual(
          "startCleanup: Page 1 is currently rendering."
        );
      }
      await renderTask.promise;

      CanvasFactory.destroy(canvasAndCtx);
      await loadingTask.destroy();
    });

    it("caches image resources at the document/page level as expected (issue 11878)", async function () {
      const { NUM_PAGES_THRESHOLD } = GlobalImageCache,
        EXPECTED_WIDTH = 2550,
        EXPECTED_HEIGHT = 3300;

      const loadingTask = getDocument(buildGetDocumentParams("issue11878.pdf"));
      const pdfDoc = await loadingTask.promise;
      let firstImgData = null;

      for (let i = 1; i <= pdfDoc.numPages; i++) {
        const pdfPage = await pdfDoc.getPage(i);
        const opList = await pdfPage.getOperatorList();

        const { commonObjs, objs } = pdfPage;
        const imgIndex = opList.fnArray.indexOf(OPS.paintImageXObject);
        const [objId, width, height] = opList.argsArray[imgIndex];

        if (i < NUM_PAGES_THRESHOLD) {
          expect(objId).toEqual(`img_p${i - 1}_1`);

          expect(objs.has(objId)).toEqual(true);
          expect(commonObjs.has(objId)).toEqual(false);
        } else {
          expect(objId).toEqual(
            `g_${loadingTask.docId}_img_p${NUM_PAGES_THRESHOLD - 1}_1`
          );

          expect(objs.has(objId)).toEqual(false);
          expect(commonObjs.has(objId)).toEqual(true);
        }
        expect(width).toEqual(EXPECTED_WIDTH);
        expect(height).toEqual(EXPECTED_HEIGHT);

        // Ensure that the actual image data is identical for all pages.
        if (i === 1) {
          firstImgData = objs.get(objId);

          expect(firstImgData.width).toEqual(EXPECTED_WIDTH);
          expect(firstImgData.height).toEqual(EXPECTED_HEIGHT);

          expect(firstImgData.kind).toEqual(ImageKind.RGB_24BPP);
          expect(firstImgData.data instanceof Uint8ClampedArray).toEqual(true);
          expect(firstImgData.data.length).toEqual(25245000);
        } else {
          const objsPool = i >= NUM_PAGES_THRESHOLD ? commonObjs : objs;
          const currentImgData = objsPool.get(objId);

          expect(currentImgData.width).toEqual(firstImgData.width);
          expect(currentImgData.height).toEqual(firstImgData.height);

          expect(currentImgData.kind).toEqual(firstImgData.kind);
          expect(currentImgData.data instanceof Uint8ClampedArray).toEqual(
            true
          );
          expect(
            currentImgData.data.every((value, index) => {
              return value === firstImgData.data[index];
            })
          ).toEqual(true);
        }
      }

      await loadingTask.destroy();
      firstImgData = null;
    });
  });

  describe("Multiple `getDocument` instances", function () {
    // Regression test for https://github.com/mozilla/pdf.js/issues/6205
    // A PDF using the Helvetica font.
    const pdf1 = buildGetDocumentParams("tracemonkey.pdf");
    // A PDF using the Times font.
    const pdf2 = buildGetDocumentParams("TAMReview.pdf");
    // A PDF using the Arial font.
    const pdf3 = buildGetDocumentParams("issue6068.pdf");
    const loadingTasks = [];

    // Render the first page of the given PDF file.
    // Fulfills the promise with the base64-encoded version of the PDF.
    async function renderPDF(filename) {
      const loadingTask = getDocument(filename);
      loadingTasks.push(loadingTask);
      const pdf = await loadingTask.promise;
      const page = await pdf.getPage(1);
      const viewport = page.getViewport({ scale: 1.2 });
      const canvasAndCtx = CanvasFactory.create(
        viewport.width,
        viewport.height
      );
      const renderTask = page.render({
        canvasContext: canvasAndCtx.context,
        canvasFactory: CanvasFactory,
        viewport,
      });
      await renderTask.promise;
      const data = canvasAndCtx.canvas.toDataURL();
      CanvasFactory.destroy(canvasAndCtx);
      return data;
    }

    afterEach(async function () {
      // Issue 6205 reported an issue with font rendering, so clear the loaded
      // fonts so that we can see whether loading PDFs in parallel does not
      // cause any issues with the rendered fonts.
      const destroyPromises = loadingTasks.map(function (loadingTask) {
        return loadingTask.destroy();
      });
      await Promise.all(destroyPromises);
    });

    it("should correctly render PDFs in parallel", async function () {
      let baseline1, baseline2, baseline3;
      const promiseDone = renderPDF(pdf1)
        .then(function (data1) {
          baseline1 = data1;
          return renderPDF(pdf2);
        })
        .then(function (data2) {
          baseline2 = data2;
          return renderPDF(pdf3);
        })
        .then(function (data3) {
          baseline3 = data3;
          return Promise.all([
            renderPDF(pdf1),
            renderPDF(pdf2),
            renderPDF(pdf3),
          ]);
        })
        .then(function (dataUrls) {
          expect(dataUrls[0]).toEqual(baseline1);
          expect(dataUrls[1]).toEqual(baseline2);
          expect(dataUrls[2]).toEqual(baseline3);
          return true;
        });

      await promiseDone;
    });
  });

  describe("PDFDataRangeTransport", function () {
    let dataPromise;

    beforeAll(function () {
      const fileName = "tracemonkey.pdf";
      dataPromise = DefaultFileReaderFactory.fetch({
        path: TEST_PDFS_PATH + fileName,
      });
    });

    afterAll(function () {
      dataPromise = null;
    });

    it("should fetch document info and page using ranges", async function () {
      const initialDataLength = 4000;
      let fetches = 0;

      const data = await dataPromise;
      const initialData = data.subarray(0, initialDataLength);
      const transport = new PDFDataRangeTransport(data.length, initialData);
      transport.requestDataRange = function (begin, end) {
        fetches++;
        waitSome(function () {
          transport.onDataProgress(4000);
          transport.onDataRange(begin, data.subarray(begin, end));
        });
      };

      const loadingTask = getDocument(transport);
      const pdfDocument = await loadingTask.promise;
      expect(pdfDocument.numPages).toEqual(14);

      const pdfPage = await pdfDocument.getPage(10);
      expect(pdfPage.rotate).toEqual(0);
      expect(fetches).toBeGreaterThan(2);

      await loadingTask.destroy();
    });

    it("should fetch document info and page using range and streaming", async function () {
      const initialDataLength = 4000;
      let fetches = 0;

      const data = await dataPromise;
      const initialData = data.subarray(0, initialDataLength);
      const transport = new PDFDataRangeTransport(data.length, initialData);
      transport.requestDataRange = function (begin, end) {
        fetches++;
        if (fetches === 1) {
          // Send rest of the data on first range request.
          transport.onDataProgressiveRead(data.subarray(initialDataLength));
        }
        waitSome(function () {
          transport.onDataRange(begin, data.subarray(begin, end));
        });
      };

      const loadingTask = getDocument(transport);
      const pdfDocument = await loadingTask.promise;
      expect(pdfDocument.numPages).toEqual(14);

      const pdfPage = await pdfDocument.getPage(10);
      expect(pdfPage.rotate).toEqual(0);
      expect(fetches).toEqual(1);

      await new Promise(resolve => {
        waitSome(resolve);
      });
      await loadingTask.destroy();
    });

    it(
      "should fetch document info and page, without range, " +
        "using complete initialData",
      async function () {
        let fetches = 0;

        const data = await dataPromise;
        const transport = new PDFDataRangeTransport(
          data.length,
          data,
          /* progressiveDone = */ true
        );
        transport.requestDataRange = function (begin, end) {
          fetches++;
        };

        const loadingTask = getDocument({
          disableRange: true,
          range: transport,
        });
        const pdfDocument = await loadingTask.promise;
        expect(pdfDocument.numPages).toEqual(14);

        const pdfPage = await pdfDocument.getPage(10);
        expect(pdfPage.rotate).toEqual(0);
        expect(fetches).toEqual(0);

        await loadingTask.destroy();
      }
    );
  });
});
